Q: Is 531 a Prime Number?
A: No, 531 is not a prime number.
A prime number is a natural number, greater than one, that can only be divided by 1 and itself.
The number 531 can be evenly divided by 1 3 9 59 177 and 531, with no remainder.
Since 531 cannot be divided by just 1 and 531, it is not a prime number.